getruntime issue

Hi,

Can someone tell me why when I do this :

start->run-> \\someMachineOnNetwork\someFolder\someFile.txt
it works perfectly

But when I try the same using a signed applet

command = "\\\\someMachineOnNetwork\\someFolder\\someFile.txt";
Runtime rt = Runtime.getRuntime();
Process child = rt.exec(command);

I have an IOException

Thanks

.